Sugar-cane mill.



A. F. BWART.

SUGAR CANE MILL. APPLICATION FILED NOV.7,1913

1,106,291, Patented Aug.4,1914.

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ARTHUR FREDERICK EWART, OF HONOLULU, TERRITORY OF HAWAII, .ASSIGNOR TOHONOLULU IRON WORKS COMPANY, OLE HONOLULU, HAWAII, A. CORPORATION OF THETERRITORY OF HAWAII.

SUGAR-CANE MILL.

To all whom it may concern Be it known that I, ARTHUR Fnunnmon EWART, asubject of the King of Great Britain, and a resident of the city andcounty of Honolulu and Territory of Hawaii, have invented certain newand useful Improvements in Sugar-Cane Mills; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to sugar-cane mills having hydraulic pressureapplied to the top roller of three rollers in triangular arrangement.

In Letters Patent #1.,061,585, issued to me May 13, 1913, I stated thatin three roller mills the crushing strain upon the can between the toproller and the feed roller is always less than that between the toproller and the discharge roller, the resultant line of force beinginclined to the vertical, and I showed means whereby the position of thetop roller with respect to the lower rollers could be adjusted so thatthe resultant line of force would coincide as nearly as possible withthe vertical center line of the housings.

The resultant line of force of the strains separating the rollers inthree roller mills is inclined to the vertical, as above mentioned,which causes the top bearings of the upper roller to cant and often tobind against the j aws of the cheeks or housings so as to prevent themfrom sliding with the vertical movement of said roller. This is due tothe preponderance of pressure on one half of each of said hearings onone side of the vertical center line of the housings over that on theirhalves on the opposite side of the said line.

The object of the present invention is to provide a simple and effectivemeans for applying the hydraulic pressure so as to prevent this cantingof the top bearings and cause the said bearings to slide vertically withthe movement of the top roller, and without binding, in the upper gapbetween the jaws of the housings.

This invention contemplates a hydraulic jack operating oil the verticalcenter of the housing, so as to apply a greater hydraulic pressure onthat half of the top bearing of the journal of the upper roller throughSpecification of Letters Patent.

Application filed November 7, 1913.

Patented Aug. 4:, 1914.

Serial No. 799,716.

which the resultant line of force above mentloned passes than on theother half of the said bearing; means for adjusting the amount that saidjack is offset from the vertical center line of the housing; and meansfor then maintaining the said jack in the adjusted position.

The invention consists in the novel construction, combination andarrangement of parts as are hereinafter described.

In the accompanying drawings, forming a part of this specification,Figure 1 represents in side elevation the upper ortion of a three rollersugar-cane mill embodying my improvements. Fig. 2 is a sectionalelevation taken on the line XX of Fig. 1.

Referring to the drawings, the top hearing 1 of the journal of the toproller 2 is adapted to slide up and down in the upper gap in the housing3 between its jaws 3 and 3 in the usual manner. A distance-piece 1 issecured between the upper ends of the jaws 3 and 3 by the keys 5 and thebolts 6. This distance-piece 4 is provided with a vertical oblong hole lthrough its center, and with a tongue 4 along the middle of its bottomsurface, as shown. The lower end of the hydraulic cylinder 7 is turnedspherical to engage a corresponding concave in the top of the steel shoe8 placed above the top hearing 1. The cylinder 7 is provided with a portS) to which the pipe to the hydraulic accumulator is attached in theusual manner; The top of the plunger 10 is provided with a groove 1Oadapted to fit the tongue 4 of the distance-piece 4. The stud bolt 11,provided with the nut 12, is screwed into the top of the plunger 10 andpasses through the oblong hole l in the distance-piece 4. A washer 13 isinterposed between the nut 12 and the top of the clistancepiece l. Ofcourse, if preferred, the tongue could be made on the plunger 10 and fita groove in the bottom of the distance-piece 4.

It will now be noted, that the plunger 10 may be clamped to the bottomof the distance-piece 4t in any one of various positions between thejaws 3 and 3", by tightening the nut .12; that the cylinder 7,the shoe 8and the plunger 10 may be moved together toward or away from. either ofthe jaws 3 or 8 when the pressure is oil and the nut 12 is loosened;that the tongue 4: guides the plunger 10 during such movement, and

thus insures the proper alinement of the hydraulics with respect to thelongitudinal center of the housing 3, represented by the line 21-13 ofFig. 2; that the cylinder 7 moves with the vertical movement of. the toproller 2; and that by shifting the hydraulics as described, a greater orless proportion of the total hydraulic pressure may thus be applied tothe top bearing on the side of the vertical center line of the housingthrough which passes the resultant line of force of the crushing strainswhich tend to lift said bearing, so that this preponderance may thus beadjusted to balance the angular upward pressure, thereby preventing thesaid bearing from tilting and binding be tween the jaws 3 and 3".

I claim:

1. In a sugar-cane mill, a housing, a top bearing adapted to move up anddown be tween the jaws of said housing, a distancepiece secured betweenthe said jaws, a hydraulic ack operating between the said top bearingand the said distance-piece, and means for adjustably clamping theplunger of the said jack to the distancepiece, substantially as and forthe purpose described.

2. In a sugar-cane mill, a housing, a top bearing adapted to move up anddown with the movement of the upper roller in the upper gap of thehousing, a distance-piece se cured between the jaws forming said gap, ahydraulic jack operating between the top bearing and the distance-piece,means for clamping the plunger of the said jack to the saiddistance-piece in any one of various positions, and means for guidingsaid plungeito insure alinement, substantially asand for the purposedescribed.

8. In a sugar-cane mill, a housing, a dis tance-piece between the aws ofthe housing, keys and bolts for removably securing the distancepiece inplace, and a hydraulic jack plunger provided with a groove adapted tofit a tongue on the bottom of the distancebearing and the distancepiece, said jack comprising a cylinder and a cooperating plunger, one ofthe same beingadjustably carried by said distance piece.

In testimony whereof I afiiX my signature, in presence of two witnesses.

ARTHUR FREDERICK RWART.

Witnesses P. H. BURNETTE, Rom. J. PRATT.

Copies of thia patent may be obtained for five cents each, by addressingthe Gommissioner of Eatents, Washington, D. G.

